(a) Conduct public hearings.
(b) Issue subpoenas for the attendance of witnesses and the production of books, records and documents relating to matters before the commission.
(c) Administer oaths.
(d) Take or cause to be taken depositions and receive such pertinent and relevant proof as may be considered necessary or proper to carry out duties of the commission and Department of Environmental Quality pursuant to ORS 448.305, 454.010 to 454.040, 454.205 to 454.255, 454.505 to 454.535, 454.605 to 454.755 and ORS chapters 468, 468A and 468B.
(2) Subpoenas authorized by this section may be served by any person authorized by the person issuing the subpoena. Witnesses who are subpoenaed shall receive the fees and mileage provided in ORS 44.415 (2). [Formerly 449.048; 1989 c.980 §14b]